63 lines
2.0 KiB
CoffeeScript
63 lines
2.0 KiB
CoffeeScript
#
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# Crafting Guide - storage.coffee
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#
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# Copyright © 2014-2017 by Redwood Labs
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# All rights reserved.
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#
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########################################################################################################################
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module.exports = class Storage
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constructor: (options={})->
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options.storage ?= window.sessionStorage
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@storage = options.storage
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@_models = {}
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# Public Methods ###############################################################################
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load: (key)->
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value = @storage.getItem key
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logger.verbose -> "loaded #{value} from #{key}"
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return value
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store: (key, value)->
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@storage.setItem key, value
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logger.verbose -> "stored #{value} into #{key}"
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register: (key, model, property, defaultValue=null)->
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modelData = @_models[key]
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if not modelData? then modelData = @_models[key] = model:model, properties:{}
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makeStoreMethod = (k, m, p)=> return => @_storeProperty(k, m, p)
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return if modelData.properties[property]?
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modelData.properties[property] = property
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@_loadProperty key, model, property, defaultValue
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model.on "change:#{property}", makeStoreMethod(key, model, property)
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unregister: (key, property)->
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modelData = @_models[key]
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return unless modelData?
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delete modelData.properties[key]
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# Private Methods ##############################################################################
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_loadProperty: (key, model, property, defaultValue=null)->
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loadedValue = @load "#{key}:#{property}"
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if loadedValue?
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value = JSON.parse loadedValue
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else
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value = defaultValue
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return unless value?
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model[property] = value
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if value? and not loadedValue?
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@_storeProperty key, model, property
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_storeProperty: (key, model, property)->
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value = JSON.stringify model[property]
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@store "#{key}:#{property}", value
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